Caterpillar Cat 312D Excavator (Prefix DLP) Service Repair Manual Instant Download

Service Repair Manual Models 312DExcavator

312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine(SEBP537... 1/23 Shutdown SIS Previous Screen Product: EXCAVATOR Model: 312D EXCAVATOR DLP Configuration: 312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine Disassembly and Assembly 312D and 313D Excavators Machine Systems Media Number -KENR6402-05 Publication Date -01/01/2012 Date Updated -17/01/2012 i04126149 Final Drive and Travel Motor - Disassemble SMCS - 4050-015; 4351-015 Disassembly Procedure Table 1 Required Tools Tool Part Number Part Description Qty A 138-7573 Link Bracket 3 B 1P-2420 Transmission Repair Stand 1 C 8T-6699 Bolts 2 1P-0074 Slide Hammer Puller Gp 1 D 4C-5666 Threaded Adapter 1 123-6702 Backlash Gauge Gp 1 E 1P-0510 Driver Gp 1 F 8H-0663 Bearing Puller Gp 1 G 1P-1863 Retaining Ring Pliers 1 H 9U-7346 Spanner Wrench As 1 Start By: a. Remove the final drive and the travel motor. Refer to Disassembly and Assembly Manual , "Final Drive and Travel Motor - Remove". NOTICE https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/5/18

312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine(SEBP537... 2/23 Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products. Dispose of all fluids according to local regulations and mandates. Personal injury can result from hydraulic oil pressure and hot oil. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system. Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand. 1. Thoroughly clean the outside of the final drive and travel motor prior to disassembly. 2. Remove the sprocket from the final drive and the travel motor. The weight of the sprocket is approximately 39 kg (85 lb). 3. Mark the alignment of the final drive and travel motor for reassembly purposes. The parts must be reinstalled in the original locations. https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/5/18

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312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine(SEBP537... 3/23 Illustration 1 g00940682 4. Use Tooling (A) and a suitable lifting device to position the final drive and the travel motor onto Tooling (B). The combined weight of the final drive and travel motor is approximately 170 kg (375 lb). 5. Drain the oil from the final drive into a suitable container for storage or for disposal. Refer to Operation and Maintenance Manual, "Capacities (Refill)" for the capacity of the final drive. 6. Remove fittings (1). Remove fittings (2) from traction control valve (3). 7. Remove nine bolts (4) that secure traction control valve (3) to the final drive. 8. Use two persons to remove traction control valve (3) from the final drive. The weight of travel brake valve (3) is approximately 27 kg (60 lb). https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/5/18

312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine(SEBP537... 4/23 Illustration 2 g00940716 9. Remove valve plate (5) and O-ring seal (6). Illustration 3 g01405139 10. Use Tooling (D) to remove bearing (7). Disassembly of the Counterbalance Valve Illustration 4 g01405725 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/5/18

312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine(SEBP537... 5/23 Illustration 5 g01405227 Personal injury can result from being struck by parts propelled by a released spring force. Make sure to wear all necessary protective equipment. Follow the recommended procedure and use all recommended tooling to release the spring force. 1. Position the counterbalance valve, as shown. Remove plug (8) and adapter (9). 2. Remove spring (10) and spool (11). Illustration 6 g01405232 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/5/18

312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine(SEBP537... 6/23 3. Remove relief valve assemblies (12). Illustration 7 g01405243 Personal injury can result from being struck by parts propelled by a released spring force. Make sure to wear all necessary protective equipment. Follow the recommended procedure and use all recommended tooling to release the spring force. 4. Remove seat (13). Seat (13) is pressed onto valve (17). Use new parts if seat (13) or valve (17) is damaged. Do not disassemble these components. Make sure that you reuse the other component. 5. Remove backup ring (14) and O-ring seal (15). 6. Remove O-ring seal (22). 7. Remove nut (20). 8. Remove screw (27). 9. Remove stopper (26). Remove backup ring (19) and O-ring seal (18) from stopper (19). 10. Remove valve (21), piston (25), and spring (16) from the housing. 11. Remove backup ring (23) and O-ring seal (24) from piston (25). https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/5/18

312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine(SEBP537... 7/23 Illustration 8 g01405284 Illustration 9 g01405299 Personal injury can result from being struck by parts propelled by a released spring force. Make sure to wear all necessary protective equipment. Follow the recommended procedure and use all recommended tooling to release the spring force. 12. Remove covers (28) and the O-ring seals. 13. Remove springs (29), guides (30), and spool assembly (31). https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/5/18

312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine(SEBP537... 8/23 Illustration 10 g01405345 Personal injury can result from being struck by parts propelled by a released spring force. Make sure to wear all necessary protective equipment. Follow the recommended procedure and use all recommended tooling to release the spring force. 14. Remove valve (32), spring (33), and ball (34) from one end of spool (35). Repeat for the other end of spool (35). Illustration 11 g01405633 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/5/18

312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine(SEBP537... 9/23 Personal injury can result from being struck by parts propelled by a released spring force. Make sure to wear all necessary protective equipment. Follow the recommended procedure and use all recommended tooling to release the spring force. 15. Remove plug (36), spring (38), and piston (39) from both sides of the housing assembly. 16. Remove O-ring seal (37) from each plug (36). Note: Remove the remaining allen head bolts from the housing assembly for cleaning purposes, if necessary. Each allen head bolt has an O-ring seal. Check the O-ring seal for wear or for damage. Replace the O-ring seal, if necessary. Disassembly of the Travel Motor Illustration 12 g01405794 1. Remove O-ring seal (40) and springs (41). https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/5/18

312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine(SEBP5... 10/23 Illustration 13 g01405828 2. Install Tooling (C) onto piston assembly (42). Use Tooling (C) and a suitable prybar to remove piston assembly (42) from body (43). Illustration 14 g01405855 3. Remove O-ring seals (45) and (46) from piston assembly (42). Remove backup rings (44) and (47) from piston assembly (42). https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/5/18

312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine(SEBP5... 11/23 Illustration 15 g01405867 4. Use suitable drivers or a suitable lever to remove guide assembly (48). Illustration 16 g01405885 5. Remove O-ring seal (49) and backup ring (50) from guide assembly (48). https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/5/18

312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine(SEBP5... 12/23 Illustration 17 g01406117 6. Remove four separator plates (51) and four friction plates (52). Note the alternating order of separator plates (51) and friction plates (52) for assembly purposes. Note: Do not allow the components of barrel assembly (53) to come apart while you remove barrel assembly (53). The components of barrel assembly (53) must be reinstalled into the original positions. Note: Oil will drain from the final drive. Place a suitable container under the final drive for storage or disposal. Refer to Operation and Maintenance Manual, "Capacities (Refill)" for the fluid capacity of the final drive. 7. Position the final drive horizontally. 8. Remove barrel assembly (53). https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/5/18

312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine(SEBP5... 13/23 Illustration 18 g01406180 Note: Mark the component locations for assembly purposes before you disassemble barrel assembly (53). 9. Remove piston assemblies (54) and retainer (55) from barrel assembly (53). Illustration 19 g01406210 Personal injury can result from being struck by parts propelled by a released spring force. Make sure to wear all necessary protective equipment. Follow the recommended procedure and use all recommended tooling to release the spring force. 10. Remove retainer (56), spacer (57), and springs (58) from barrel assembly (53). https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/5/18

312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine(SEBP5... 14/23 Illustration 20 g01406263 11. Put location marks on cam plate (59) for assembly purposes. Make sure that the thick end of cam plate (59) is adjacent to the opening that is across body (43). Remove cam plate (59). Illustration 21 g01406329 Illustration 22 g01406338 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/5/18

312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine(SEBP5... 15/23 Personal injury can result from being struck by parts propelled by a released spring force. Make sure to wear all necessary protective equipment. Follow the recommended procedure and use all recommended tooling to release the spring force. 12. Remove piston (60) and spring (62). 13. Remove key (61). Disassembly of the Final Drive Illustration 23 g01406376 1. Use a suitable lifting device to position the final drive on Tooling (B), as shown. The weight of the final drive is approximately 200 kg (441 lb). 2. Remove plugs (63). Remove the O-ring seals from plugs (63). Check the O-ring seals for wear or for damage. Replace the O-ring seals, if necessary. 3. Remove bolts (65). Remove cover (64). https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/5/18

312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine(SEBP5... 16/23 Illustration 24 g01406386 4. Raise the temperature of bolts (66) in order to loosen the thread sealant. 5. Remove bolts (66) and plate (67). Illustration 25 g01406397 6. Remove sun gear (68). https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/5/18

312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine(SEBP5... 17/23 Illustration 26 g01406400 7. Attach Tooling (A) and a suitable lifting device to carrier assembly (69). Remove carrier assembly (69), planetary gear assembly (70), and bearing assembly (71) as a unit. Illustration 27 g01406789 8. Remove planetary gear (70) and bearing assembly (71) from carrier assembly (69). Remove the remaining planetary gears (70) and bearings (71). Illustration 28 g01406822 9. Remove sun gear (72). https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/5/18

312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine(SEBP5... 18/23 10. Raise the temperature of bolts (73) in order to loosen the thread sealant. Remove bolts (73). Remove plate (74). Illustration 29 g01406850 11. Remove retaining ring (75) from sun gear (72). Check retaining ring (75) for wear or for damage. Replace retaining ring (75), if necessary. Illustration 30 g01406853 12. Remove planetary gear (76). https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/5/18

312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine(SEBP5... 19/23 Illustration 31 g01406875 13. Remove bearing (77), race (78), and thrust washer (79). 14. Repeat Steps 12 and 13 in order to remove the remaining planetary gear assemblies. Illustration 32 g01406882 15. Remove bolt (80) and plate (81). https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/5/18

312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine(SEBP5... 20/23 Illustration 33 g01406885 Illustration 34 g01406886 16. Use Tooling (H) to remove nut (82). Illustration 35 g01406906 17. Install Tooling (A) and a suitable lifting device to housing (83). The weight of housing (83) is approximately 35 kg (77 lb). 18. Remove housing (83) from body assembly (84). https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/5/18

312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine(SEBP5... 21/23 Illustration 36 g01406912 19. Remove Duo-Cone Seal Gp seal (85) from the body assembly. Remove the Duo-Cone Seal Gp seal from the housing. Illustration 37 g01407100 20. Remove both bearings (86) from housing (83). https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/5/18

312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine(SEBP5... 22/23 Illustration 38 g01407089 21. Remove both bearings (87) from housing (83). Illustration 39 g01407115 22. Position body assembly (84) horizontally. Remove shaft assembly (88), the bearing, and the retaining ring. https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/5/18

312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine(SEBP5... 23/23 Illustration 40 g01407144 23. Use Tooling (G) to remove retaining ring (89) from shaft assembly (88). Illustration 41 g01407161 24. Use Tooling (E), Tooling (F), and a suitable press to remove bearing (90). Illustration 42 g01407166 25. Remove lip seal (91) from the body assembly. Copyright 1993 - 2020 Caterpillar Inc. Mon May 18 01:52:44 UTC+0800 2020 All Rights Reserved. Private Network For SIS Licensees. https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/5/18

312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine(SEBP537... 1/24 Shutdown SIS Previous Screen Product: EXCAVATOR Model: 312D EXCAVATOR DLP Configuration: 312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine Disassembly and Assembly 312D and 313D Excavators Machine Systems Media Number -KENR6402-05 Publication Date -01/01/2012 Date Updated -17/01/2012 i07269885 Final Drive and Travel Motor - Assemble SMCS - 4050-016; 4351-016 Assembly Procedure Table 1 Required Tools Tool Part Number Part Description Qty A 138-7573 Link Bracket 3 B 1P-2420 Transmission Repair Stand 1 E 1P-0510 Driver Gp 1 F 8H-0663 Bearing Puller Gp 1 G 1P-1863 Retaining Ring Pliers 1 H 9U-7346 Spanner Wrench As 1 Mounting Adapter Gp(1) K 1U-7558 1 L - Loctite 271 - M - Loctite High Flex GM - N 169-0503 Installation Kit 1 P 1U-6434 Duo-Cone Seal Installer As 1 Q 4C-3761 C-Clamp 2 R FT-2766 Rolling Torque Bar 1 S - Loctite 272 - (1) https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/5/18

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312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine(SEBP537... 2/24 The bent plates for the mounting adapter may be modified so that the mounting adapter can be assembled to the housing. Assembly Procedure for the Final Drive Illustration 1 g01407166 1. Use Tooling (E) to install lip seal (91) into the body assembly. Illustration 2 g01407561 2. Use Tooling (E), Tooling (F), and a suitable press to install bearing assembly (90) onto shaft assembly (88). https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/5/18

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